xref: /llvm-project/llvm/test/CodeGen/RISCV/avgceils.ll (revision 9122c5235ec85ce0c0ad337e862b006e7b349d84)

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=riscv32 -verify-machineinstrs < %s | FileCheck -check-prefix=RV32I %s
; RUN: llc -mtriple=riscv64 -verify-machineinstrs < %s | FileCheck -check-prefix=RV64I %s

;
; fixed avg(x,y) = sub(or(x,y),ashr(xor(x,y),1))
;
; ext avg(x,y) = trunc(ashr(add(sext(x),sext(y),1),1))
;

define i8 @test_fixed_i8(i8 %a0, i8 %a1) nounwind {
; RV32I-LABEL: test_fixed_i8:
; RV32I:       # %bb.0:
; RV32I-NEXT:    slli a1, a1, 24
; RV32I-NEXT:    slli a0, a0, 24
; RV32I-NEXT:    srai a1, a1, 24
; RV32I-NEXT:    srai a0, a0, 24
; RV32I-NEXT:    add a0, a0, a1
; RV32I-NEXT:    addi a0, a0, 1
; RV32I-NEXT:    srai a0, a0, 1
; RV32I-NEXT:    ret
;
; RV64I-LABEL: test_fixed_i8:
; RV64I:       # %bb.0:
; RV64I-NEXT:    slli a1, a1, 56
; RV64I-NEXT:    slli a0, a0, 56
; RV64I-NEXT:    srai a1, a1, 56
; RV64I-NEXT:    srai a0, a0, 56
; RV64I-NEXT:    add a0, a0, a1
; RV64I-NEXT:    addi a0, a0, 1
; RV64I-NEXT:    srai a0, a0, 1
; RV64I-NEXT:    ret
  %or = or i8 %a0, %a1
  %xor = xor i8 %a0, %a1
  %shift = ashr i8 %xor, 1
  %res = sub i8 %or, %shift
  ret i8 %res
}

define i8 @test_ext_i8(i8 %a0, i8 %a1) nounwind {
; RV32I-LABEL: test_ext_i8:
; RV32I:       # %bb.0:
; RV32I-NEXT:    slli a1, a1, 24
; RV32I-NEXT:    slli a0, a0, 24
; RV32I-NEXT:    srai a1, a1, 24
; RV32I-NEXT:    srai a0, a0, 24
; RV32I-NEXT:    add a0, a0, a1
; RV32I-NEXT:    addi a0, a0, 1
; RV32I-NEXT:    srai a0, a0, 1
; RV32I-NEXT:    ret
;
; RV64I-LABEL: test_ext_i8:
; RV64I:       # %bb.0:
; RV64I-NEXT:    slli a1, a1, 56
; RV64I-NEXT:    slli a0, a0, 56
; RV64I-NEXT:    srai a1, a1, 56
; RV64I-NEXT:    srai a0, a0, 56
; RV64I-NEXT:    add a0, a0, a1
; RV64I-NEXT:    addi a0, a0, 1
; RV64I-NEXT:    srai a0, a0, 1
; RV64I-NEXT:    ret
  %x0 = sext i8 %a0 to i16
  %x1 = sext i8 %a1 to i16
  %sum = add i16 %x0, %x1
  %sum1 = add i16 %sum, 1
  %shift = ashr i16 %sum1, 1
  %res = trunc i16 %shift to i8
  ret i8 %res
}

define i16 @test_fixed_i16(i16 %a0, i16 %a1) nounwind {
; RV32I-LABEL: test_fixed_i16:
; RV32I:       # %bb.0:
; RV32I-NEXT:    slli a1, a1, 16
; RV32I-NEXT:    slli a0, a0, 16
; RV32I-NEXT:    srai a1, a1, 16
; RV32I-NEXT:    srai a0, a0, 16
; RV32I-NEXT:    add a0, a0, a1
; RV32I-NEXT:    addi a0, a0, 1
; RV32I-NEXT:    srai a0, a0, 1
; RV32I-NEXT:    ret
;
; RV64I-LABEL: test_fixed_i16:
; RV64I:       # %bb.0:
; RV64I-NEXT:    slli a1, a1, 48
; RV64I-NEXT:    slli a0, a0, 48
; RV64I-NEXT:    srai a1, a1, 48
; RV64I-NEXT:    srai a0, a0, 48
; RV64I-NEXT:    add a0, a0, a1
; RV64I-NEXT:    addi a0, a0, 1
; RV64I-NEXT:    srai a0, a0, 1
; RV64I-NEXT:    ret
  %or = or i16 %a0, %a1
  %xor = xor i16 %a0, %a1
  %shift = ashr i16 %xor, 1
  %res = sub i16 %or, %shift
  ret i16 %res
}

define i16 @test_ext_i16(i16 %a0, i16 %a1) nounwind {
; RV32I-LABEL: test_ext_i16:
; RV32I:       # %bb.0:
; RV32I-NEXT:    slli a1, a1, 16
; RV32I-NEXT:    slli a0, a0, 16
; RV32I-NEXT:    srai a1, a1, 16
; RV32I-NEXT:    srai a0, a0, 16
; RV32I-NEXT:    add a0, a0, a1
; RV32I-NEXT:    addi a0, a0, 1
; RV32I-NEXT:    srai a0, a0, 1
; RV32I-NEXT:    ret
;
; RV64I-LABEL: test_ext_i16:
; RV64I:       # %bb.0:
; RV64I-NEXT:    slli a1, a1, 48
; RV64I-NEXT:    slli a0, a0, 48
; RV64I-NEXT:    srai a1, a1, 48
; RV64I-NEXT:    srai a0, a0, 48
; RV64I-NEXT:    add a0, a0, a1
; RV64I-NEXT:    addi a0, a0, 1
; RV64I-NEXT:    srai a0, a0, 1
; RV64I-NEXT:    ret
  %x0 = sext i16 %a0 to i32
  %x1 = sext i16 %a1 to i32
  %sum = add i32 %x0, %x1
  %sum1 = add i32 %sum, 1
  %shift = ashr i32 %sum1, 1
  %res = trunc i32 %shift to i16
  ret i16 %res
}

define i32 @test_fixed_i32(i32 %a0, i32 %a1) nounwind {
; RV32I-LABEL: test_fixed_i32:
; RV32I:       # %bb.0:
; RV32I-NEXT:    or a2, a0, a1
; RV32I-NEXT:    xor a0, a0, a1
; RV32I-NEXT:    srai a0, a0, 1
; RV32I-NEXT:    sub a0, a2, a0
; RV32I-NEXT:    ret
;
; RV64I-LABEL: test_fixed_i32:
; RV64I:       # %bb.0:
; RV64I-NEXT:    sext.w a1, a1
; RV64I-NEXT:    sext.w a0, a0
; RV64I-NEXT:    add a0, a0, a1
; RV64I-NEXT:    addi a0, a0, 1
; RV64I-NEXT:    srai a0, a0, 1
; RV64I-NEXT:    ret
  %or = or i32 %a0, %a1
  %xor = xor i32 %a1, %a0
  %shift = ashr i32 %xor, 1
  %res = sub i32 %or, %shift
  ret i32 %res
}

define i32 @test_ext_i32(i32 %a0, i32 %a1) nounwind {
; RV32I-LABEL: test_ext_i32:
; RV32I:       # %bb.0:
; RV32I-NEXT:    or a2, a0, a1
; RV32I-NEXT:    xor a0, a0, a1
; RV32I-NEXT:    srai a0, a0, 1
; RV32I-NEXT:    sub a0, a2, a0
; RV32I-NEXT:    ret
;
; RV64I-LABEL: test_ext_i32:
; RV64I:       # %bb.0:
; RV64I-NEXT:    sext.w a1, a1
; RV64I-NEXT:    sext.w a0, a0
; RV64I-NEXT:    add a0, a0, a1
; RV64I-NEXT:    addi a0, a0, 1
; RV64I-NEXT:    srai a0, a0, 1
; RV64I-NEXT:    ret
  %x0 = sext i32 %a0 to i64
  %x1 = sext i32 %a1 to i64
  %sum = add i64 %x0, %x1
  %sum1 = add i64 %sum, 1
  %shift = ashr i64 %sum1, 1
  %res = trunc i64 %shift to i32
  ret i32 %res
}

define i64 @test_fixed_i64(i64 %a0, i64 %a1) nounwind {
; RV32I-LABEL: test_fixed_i64:
; RV32I:       # %bb.0:
; RV32I-NEXT:    or a4, a1, a3
; RV32I-NEXT:    xor a1, a1, a3
; RV32I-NEXT:    xor a3, a0, a2
; RV32I-NEXT:    or a0, a0, a2
; RV32I-NEXT:    srai a2, a1, 1
; RV32I-NEXT:    slli a1, a1, 31
; RV32I-NEXT:    srli a3, a3, 1
; RV32I-NEXT:    sub a4, a4, a2
; RV32I-NEXT:    or a3, a3, a1
; RV32I-NEXT:    sltu a1, a0, a3
; RV32I-NEXT:    sub a1, a4, a1
; RV32I-NEXT:    sub a0, a0, a3
; RV32I-NEXT:    ret
;
; RV64I-LABEL: test_fixed_i64:
; RV64I:       # %bb.0:
; RV64I-NEXT:    or a2, a0, a1
; RV64I-NEXT:    xor a0, a0, a1
; RV64I-NEXT:    srai a0, a0, 1
; RV64I-NEXT:    sub a0, a2, a0
; RV64I-NEXT:    ret
  %or = or i64 %a0, %a1
  %xor = xor i64 %a1, %a0
  %shift = ashr i64 %xor, 1
  %res = sub i64 %or, %shift
  ret i64 %res
}

define i64 @test_ext_i64(i64 %a0, i64 %a1) nounwind {
; RV32I-LABEL: test_ext_i64:
; RV32I:       # %bb.0:
; RV32I-NEXT:    or a4, a1, a3
; RV32I-NEXT:    xor a1, a1, a3
; RV32I-NEXT:    xor a3, a0, a2
; RV32I-NEXT:    or a0, a0, a2
; RV32I-NEXT:    srai a2, a1, 1
; RV32I-NEXT:    slli a1, a1, 31
; RV32I-NEXT:    srli a3, a3, 1
; RV32I-NEXT:    sub a4, a4, a2
; RV32I-NEXT:    or a3, a3, a1
; RV32I-NEXT:    sltu a1, a0, a3
; RV32I-NEXT:    sub a1, a4, a1
; RV32I-NEXT:    sub a0, a0, a3
; RV32I-NEXT:    ret
;
; RV64I-LABEL: test_ext_i64:
; RV64I:       # %bb.0:
; RV64I-NEXT:    or a2, a0, a1
; RV64I-NEXT:    xor a0, a0, a1
; RV64I-NEXT:    srai a0, a0, 1
; RV64I-NEXT:    sub a0, a2, a0
; RV64I-NEXT:    ret
  %x0 = sext i64 %a0 to i128
  %x1 = sext i64 %a1 to i128
  %sum = add i128 %x0, %x1
  %sum1 = add i128 %sum, 1
  %shift = ashr i128 %sum1, 1
  %res = trunc i128 %shift to i64
  ret i64 %res
}